Workflow - settings for sending SMS
To send an SMS to the customer, you need to set workflow (WF) to enable the functionality for sending SMS.
In Administration panel | Settings | Documentation | Mailboxes, import eSMS service register from web services.
Select Transfer Registers and then select eSMS service.
... then we click 
and when is downloaded we click OK and we close the window
.. now we have eSMS services in database
After we import eSMS services we need to import WF for sending SMS.
We go to Settins - Documentacion -Workflow design
In module workflow design we clik in button 
and we choose Transfer Register and we choose Send SMS for appointmne( For now is only for SL loc)
... then we click and when is downloaded we click OK and we close the window. WF is now in database
The final step is to set from where we will send SMS
In Workflow design we go in settings and we find Send SMS for appointment and we can change the settings or we can add new form from where we ahnat sending SMS
... if we want to add new form, than we need first to open form that we want to add, than we can choose forem and wizard type
More about workflow you can read here.